Environmental quality: the twentieth annual report of the Council on Environmental Quality together with the President's message to Congress 

 - Washington, D.C.  Executive Office of the President, Council on Environmental Quality  1990 
 - xxv, 494  Páginas  il.  23 cm 
 - (Environmental quality) .
<br/><br/>Bibliografía al final de los capítulos 
<br/><br/><br/>Inglés 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CALIDAD AMBIENTAL<br/>INFORMES ANUALES<br/>MEDIO AMBIENTE<br/>PROTECCION AMBIENTAL
<br/><br/><label>Subjects--Geographic Terms: </label><br/>ESTADOS UNIDOS
<br/><br/><label>Dewey Class. No.: </label>504(73) E 
<br/><br/><label>Gov. Doc. Class. No.: </label>1893